Trained with the tokens:
nanachi (made in abyss) - all images
nanachipants - images with nanachi's pants
nanachihat - images with nanachi's hat
You may need to negative "planks" and "long hair" to get the hat completely off. "nude" almost guarantees taking both off.
Adding "furry" is extremely helpful, "fur" and "fluffy" can help make Nanachi even fluffier!